One GCM at a 25 km resolution were tested (“CNRM-CM6”), including Sea Surface Temperature (tos), Sea Surface Salinity (sos), Sea Surface Height (zos) and Mixed Layer Depth (mlotst). These 4 dynamic variables were first (i) extracted from CMIP6 for the historical period (1993-2014) and contemporary period (2015-2020) from ssp126. Then, each variable was included in the initial models run on the available dataset (current predictions: “present”).
The results here are presented for summer only.
Figure 2.1: Boxplot of the performance metrics for bowheads in summer.
Strong inter-run variability for bowheads East with earth algorithm (MARS), so the best algo chosen was the blackboost (BRT) for both sides; but still quite low performance east side (especially low specificity: does not predict well whale’s presence).
Figure 2.2: Boxplot of the performance metrics for narwhals in summer.
The Random Forest suffers from overfitting, so the best algorithm is the NNET for narwhals East and blackboost (BRT) for narwhals West.
Figure 2.3: Boxplot of the performance metrics for belugas in summer.
The best algo is the NNET for belugas.
Figure 3.1: Max prediction maps for belugas in present summer from the NNET.
Figure 3.2: Mean projection maps for Belugas in summer 2030 from the NNET (ssp126).
Figure 3.3: Mean projection maps for Belugas in summer 2030 from the NNET (ssp585).
Figure 3.4: Mean projection maps for Belugas in summer 2060 from the NNET (ssp126).
Figure 3.5: Mean projection maps for Belugas in summer 2060 from the NNET (ssp585).
Figure 3.6: Mean projection maps for Belugas in summer 2100 from the NNET (ssp126).
Figure 3.7: Mean projection maps for Belugas in summer 2100 from the NNET (ssp585).
Figure 4.1: Mean prediction maps for Narwhals in present summer from the NNEt (East) and BRT (West).
Figure 4.2: Mean projection maps for Narwhals in summer 2030 from the BRT and NNET (ssp585).
Figure 4.3: Mean projection maps for Narwhals in summer 2030 from the BRT and NNET (ssp585).
Figure 4.4: Mean projection maps for Narwhals in summer 2060 from the BRT and NNET (ssp585).
Figure 4.5: Mean projection maps for Narwhals in summer 2060 from the BRT and NNET (ssp585).
Figure 4.6: Mean projection maps for Narwhals in summer 2100 from the BRT and NNET (ssp585).
Figure 4.7: Mean projection maps for Narwhals in summer 2100 from the BRT and NNET (ssp585).
Figure 5.1: Mean prediction maps for Bowheads in present summer from the BRT and MARS.
Figure 5.2: Mean projection maps for Bowheads in summer 2030 from the BRT (ssp126).
Figure 5.3: Mean projection maps for Bowheads in summer 2030 from the BRT (ssp585).
Figure 5.4: Mean projection maps for Bowheads in summer 2100 from the BRT (ssp126).
Figure 5.5: Mean projection maps for Bowheads in summer 2100 from the BRT (ssp585).